Trying Out Marriage With My Female Friend by Usui Shio — Ongoing

Also known as Onna Tomodachi to Kekkon Shitemita

Cover

Two women who are just friends make a pact... "If both of us are still single in 5 years, let's get married." Five years later, they meet again, and their married life begins.

Serialized in Yuri Hime starting in January 2021.

Volume 1
Chapter 1: Trying out marriage with my female friend released Nov 23 '20 Bread
Chapter 2: The ideals and realities of married life released Dec 29 '20
Chapter 3: Their first outing as a family released Jan 26 '21 Food
Chapter 4: What is true happiness? released Mar 1 '21
Chapter 5: Even when we're apart, we still... released Apr 9 '21
Chapter 6: Loneliness and happiness released Apr 30 '21
Chapter 7: It's alright, I can endure this released Jun 8 '21
Chapter 8: What's important to me released Jul 3 '21
Chapter 8.5: Volume 1 extras released Sep 30 '21
Volume 2
Chapter 9: My family's family released Jul 25 '21
Chapter 10: Today's a lazy sort of day, where I don't want to do anything released Sep 30 '21
Chapter 11: It's not always sunny, even when the sun is shining released Nov 8 '21
Chapter 12: Their first time leaving things unresolved released Dec 9 '21
Chapter 13: What's the best way for me to start this conversation? released Jan 1 '22
Chapter 14: Couple's bonding day released Jan 31 '22
Chapter 15: Let's be there for each other released Mar 11 '22 Food
Chapter 16: Let's cherish this time we spend together released Apr 6 '22 Bath Bread
Chapter 16.5: Volume 2 extras released Apr 28 '22 Food
Volume 3
Chapter 17: The days we've spent as a couple are adding up released Jun 5 '22